Note 10 - Operating Segments - Segment Financial Information (Details) - USD ($) |
3 Months Ended | 6 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2017 |
Jun. 30, 2016 |
Jun. 30, 2017 |
Jun. 30, 2016 |
||||||||
| Interest expense-financing fees | $ (9,000) | $ (29,000) | $ (18,000) | $ (85,000) | |||||||
| Depreciation and amortization | 1,133,000 | 912,000 | 2,288,000 | 1,796,000 | |||||||
| Segment income (loss) before income taxes | (1,160,000) | (11,301,000) | (1,754,000) | (15,110,000) | |||||||
| Income tax expense (benefit) | 66,000 | (3,167,000) | 147,000 | (3,130,000) | |||||||
| Segment income (loss) | (1,226,000) | (8,134,000) | (1,901,000) | (11,980,000) | |||||||
| Expenditures for segment assets | 94,000 | 20,000 | 116,000 | 28,000 | |||||||
| Revenue from external customers | 12,715,000 | 14,809,000 | 25,422,000 | 24,847,000 | |||||||
| Intercompany revenues | |||||||||||
| Gross profit | 2,354,000 | 1,816,000 | 5,073,000 | 1,850,000 | |||||||
| Research and development | 619,000 | 554,000 | 1,008,000 | 1,128,000 | |||||||
| Interest income | 36,000 | 31,000 | 71,000 | 47,000 | |||||||
| Interest expense | (90,000) | (108,000) | (189,000) | (276,000) | |||||||
| Treatment [Member] | |||||||||||
| Interest expense-financing fees | |||||||||||
| Depreciation and amortization | 988,000 | 705,000 | 1,997,000 | 1,418,000 | |||||||
| Segment income (loss) before income taxes | 1,238,000 | (10,557,000) | [1] | 2,840,000 | (11,805,000) | [1] | |||||
| Income tax expense (benefit) | 65,000 | (3,167,000) | [1] | 145,000 | (3,130,000) | [1] | |||||
| Segment income (loss) | 1,173,000 | (7,390,000) | 2,695,000 | (8,675,000) | |||||||
| Expenditures for segment assets | 91,000 | 16,000 | 106,000 | 23,000 | |||||||
| Revenue from external customers | 9,630,000 | 7,985,000 | 19,665,000 | 15,189,000 | |||||||
| Intercompany revenues | 97,000 | 6,000 | 113,000 | 10,000 | |||||||
| Gross profit | 2,174,000 | 582,000 | 4,861,000 | 444,000 | |||||||
| Research and development | 62,000 | 120,000 | 243,000 | 226,000 | |||||||
| Interest income | 2,000 | 2,000 | |||||||||
| Interest expense | (18,000) | (14,000) | (26,000) | (16,000) | |||||||
| Services [Member] | |||||||||||
| Interest expense-financing fees | |||||||||||
| Depreciation and amortization | 135,000 | 160,000 | 271,000 | 321,000 | |||||||
| Segment income (loss) before income taxes | (553,000) | 1,046,000 | (1,260,000) | 322,000 | |||||||
| Income tax expense (benefit) | |||||||||||
| Segment income (loss) | (553,000) | 1,046,000 | (1,260,000) | 322,000 | |||||||
| Expenditures for segment assets | 3,000 | 4,000 | 10,000 | 4,000 | |||||||
| Revenue from external customers | 3,085,000 | 6,824,000 | 5,757,000 | 9,658,000 | |||||||
| Intercompany revenues | 7,000 | 10,000 | 10,000 | 15,000 | |||||||
| Gross profit | 180,000 | 1,234,000 | 212,000 | 1,406,000 | |||||||
| Research and development | 7,000 | 33,000 | |||||||||
| Interest income | |||||||||||
| Interest expense | (1,000) | ||||||||||
| Medical [Member] | |||||||||||
| Interest expense-financing fees | |||||||||||
| Depreciation and amortization | |||||||||||
| Segment income (loss) before income taxes | (550,000) | (416,000) | (750,000) | (854,000) | |||||||
| Income tax expense (benefit) | |||||||||||
| Segment income (loss) | (550,000) | (416,000) | (750,000) | (854,000) | |||||||
| Expenditures for segment assets | 1,000 | ||||||||||
| Revenue from external customers | |||||||||||
| Intercompany revenues | |||||||||||
| Gross profit | |||||||||||
| Research and development | 550,000 | 416,000 | 750,000 | 854,000 | |||||||
| Interest income | |||||||||||
| Interest expense | |||||||||||
| Segments Total [Member] | |||||||||||
| Interest expense-financing fees | |||||||||||
| Depreciation and amortization | 1,123,000 | 865,000 | 2,268,000 | 1,739,000 | |||||||
| Segment income (loss) before income taxes | 135,000 | (9,927,000) | 830,000 | (12,337,000) | |||||||
| Income tax expense (benefit) | 65,000 | (3,167,000) | 145,000 | (3,130,000) | |||||||
| Segment income (loss) | 70,000 | (6,760,000) | 685,000 | (9,207,000) | |||||||
| Expenditures for segment assets | 94,000 | 20,000 | 116,000 | 28,000 | |||||||
| Revenue from external customers | 12,715,000 | 14,809,000 | 25,422,000 | 24,847,000 | |||||||
| Intercompany revenues | 104,000 | 16,000 | 123,000 | 25,000 | |||||||
| Gross profit | 2,354,000 | 1,816,000 | 5,073,000 | 1,850,000 | |||||||
| Research and development | 612,000 | 543,000 | 993,000 | 1,113,000 | |||||||
| Interest income | 2,000 | 2,000 | |||||||||
| Interest expense | (18,000) | (14,000) | (27,000) | (16,000) | |||||||
| Corporate and Other [Member] | |||||||||||
| Interest expense-financing fees | [2] | (9,000) | (29,000) | (18,000) | (85,000) | ||||||
| Depreciation and amortization | [2] | 10,000 | 47,000 | 20,000 | 57,000 | ||||||
| Segment income (loss) before income taxes | [2] | (1,295,000) | (1,374,000) | (2,584,000) | (2,773,000) | ||||||
| Income tax expense (benefit) | [2] | 1,000 | 2,000 | ||||||||
| Segment income (loss) | [2] | (1,296,000) | (1,374,000) | (2,586,000) | (2,773,000) | ||||||
| Expenditures for segment assets | [2] | ||||||||||
| Revenue from external customers | [2] | ||||||||||
| Intercompany revenues | [2] | ||||||||||
| Gross profit | [2] | ||||||||||
| Research and development | [2] | 7,000 | 11,000 | 15,000 | 15,000 | ||||||
| Interest income | [2] | 36,000 | 29,000 | 71,000 | 45,000 | ||||||
| Interest expense | [2] | $ (72,000) | $ (94,000) | $ (162,000) | $ (260,000) | ||||||
| |||||||||||